Răspuns :
a) = 96 + 40 + 14 = 150
b) = 7 + 140 + 40 + 4 = 191
c) = 1+2+3+....+120 = 120 x( 120+1):2 = 120 x 121 :2 = 7260
b) = 7 + 140 + 40 + 4 = 191
c) = 1+2+3+....+120 = 120 x( 120+1):2 = 120 x 121 :2 = 7260